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  1. n = int(input())
  2.  
  3. dx, dy = 1, 0
  4. x, y = 0, 0
  5. arr = [[None] * n for _ in range(n)]
  6. for i in range(1, n**2+1):
  7.     arr[x][y] = i
  8.     nx, ny = x+dx, y+dy
  9.     if 0 <= nx < n and 0 <= ny < n and not arr[nx][ny]:
  10.         x, y = nx, ny
  11.     else:
  12.         dx, dy = -dy, dx
  13.         x = x + dx
  14.         y = y + dy
  15.  
  16. for y in range(n):
  17.     for x in range(n):
  18.         print(arr[x][y], end = ' ')
  19.     print()
Runtime error #stdin #stdout #stderr 0.02s 28384KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
Traceback (most recent call last):
  File "./prog.py", line 1, in <module>
EOFError: EOF when reading a line
https://ideone.com/f8Cthu
language:
Python 3 (python  3.12)
created:
8 years ago
visibility:
secret

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